RU2592890C1 - Led lamp - Google Patents

Abstract

FIELD: lighting engineering.

SUBSTANCE: invention relates to lighting engineering, namely, to design of general led lamps. Led lamp contains housing (1), coated with dielectric heat-conducting plastic; board with leds; diffuser (5), covering light-emitting diodes; power supply and base (7). Housing-radiator (1) includes two combined aluminium profiles (8), inner and outer surface of which is coated with dielectric heat-conducting plastic, outer wall has elongated ends (11) and flat surface section equipped with heat-removing cooling ribs (12), heat-removing ribs of the first part of the housing-radiator are oriented to the heat-removing ribs of the second part of the housing-radiator and mounted with gap (13); Board with leds is installed on flat surface sections of each aluminium profile; and elongated ends (11) of outer walls of each aluminium profile are connected to base (7) by means of dielectric heat-conducting plastic, recess (14) for power supply arrangement is made of plastic material, power supply is separated from the aluminium profile by air gap (15).

EFFECT: technical result is improved heat removal from leds and power supply, improved adaptability to manufacture and luminous efficacy of the lamp.

1 cl, 7 dwg

Description

Technical field

The invention relates to lighting engineering, and in particular to the design of general-purpose LED lamps.

State of the art

General-purpose LED lamps usually have the following main components and elements: an axisymmetric convex light-scattering sheath, a board with LEDs, a radiator for convective heat transfer, an integrated power source and a base for connecting to the power supply network, various additional components and elements that can increase efficiency lamp operation.

One of the most important problems is ensuring the operating temperature conditions of the LEDs and the power source. Moreover, their mutual thermal influence becomes an independent problem. In any case, the problem of removal of excess heat is solved by convection heat transfer and thermal radiation from the surface of the radiator to the surrounding air. The more powerful the lamp, the more urgent the question is how to quickly remove the generated heat to the surface of the heat transfer to the surrounding air.

Known LED lamp containing a housing-radiator made of an insulating material having a convection heat exchange surface with the environment; LED radiation diffuser mounted on a radiator case; LEDs mounted on the board; a heat-conducting element installed with the possibility of heat exchange with the LED board and with a radiator case; LED power supply and base (TW 201405067, IPC F21V 3/04, published 02/01/2014).

The disadvantages of the known solution include the fact that with this design it is difficult to make a high-power lamp with acceptable dimensions due to insufficient heat removal from LEDs, the heat radiation of which is limited on one side by an air cushion under the diffuser, and on the other hand, by a closed cavity inside the radiator in which the source is located food, also a source of heat. The LEDs and the power source have a negative effect on each other, and the weak source is the power source, the operating temperature for which should be significantly lower than it can be with LEDs.

Other solutions are known, for example, CN 203477931 U, JP 539258782 B2, CN 203500894 U, CN 203731137 U, common for which is the presence of a light diffuser for LEDs and the placement of a power source exposed to the thermal effects of LEDs in a closed lamp housing.

The presence of the author’s international application PCT / RU2014 / 000997 with priority of 12/26/2014, which describes the design of an LED lamp containing an LED board equipped with a heat sink, the entire surface of which is a surface of heat transfer and heat radiation, should be indicated.

The solution described in TW 201405067 is selected as a prototype, since it is closest to the claimed solution in terms of the number of matching features.

The technical result of the claimed solution is to improve the heat dissipation from the LEDs and the power source, increasing the manufacturability and luminous efficiency of the lamp.

Disclosure of invention

The claimed invention is characterized by the following set of features.

An LED lamp comprising a radiator housing coated with a dielectric heat-conducting plastic; circuit board with LEDs; diffuser that covers the LEDs; a power source and a base, characterized in that the radiator case consists of the first and second parts, each of which includes a combined aluminum profile, the inner and outer surface of which is covered with dielectric heat-conducting plastic, the outer wall has elongated ends and a flat surface area provided with heat-removing fins cooling, while the heat sink fins of the first part of the heat sink body are oriented towards the heat sink fins of the second part of the heat sink body and are mounted with a gap ; LED board installed on flat surface areas of each aluminum profile; and the elongated ends of the outer wall of each aluminum profile are connected to the base using a dielectric heat-conducting plastic, from the material of which a niche is made between the elongated ends of the outer wall of the aluminum profile to accommodate the power source, separated from the aluminum profile by an air gap.

In one embodiment, the combined aluminum profile comprises hollow spaces of elongated shape, and the heat-removing ribs bounding them connect the flat portion and the elongated ends of the aluminum profile.

In another embodiment, the combined aluminum profile has one or more closed cavities adjacent to a flat section of the profile, the walls of which are heat-removing ribs.

An important advantage of the claimed LED lamp is to minimize the dependence of the temperature regime of the power source on the temperature of the LEDs, which dramatically increases the lamp life. This advantage is achieved by placing the power source in a niche made of heat-conducting dielectric plastic and separated by an air gap from the aluminum profile, as well as by significantly increasing the area of heat transfer to the ambient air from the surface of the niche, in addition to high heat transfer from the entire surface of the heat-removing fins.

Brief Description of the Drawings

The claimed solution is illustrated by the following graphic materials:

FIG. 1 is a three-dimensional image of a variant of the LED lamp assembly,

FIG. 2 is a three-dimensional image of the LED lamp shown in FIG. 1, parsed,

FIG. 3 is a plan view of an embodiment of an LED lamp,

FIG. 4 is a cross section of the LED lamp shown in FIG. 3

FIG. 5 is a drawing of a variant of the aluminum profile of the LED lamp shown in FIG. 2

FIG. 6 is a first axial section of the LED lamp shown in FIG. one,

FIG. 7 is a second axial section of a plane passing in the gap between the parts of the housing of the LED lamp shown in FIG. one.

The list of positions in the drawings:

1. Housing-radiator of an LED lamp.

2. A layer of dielectric heat-conducting material.

3. LED board.

4. LEDs.

5. The diffuser.

6. Power source.

7. The basement.

8. Combined aluminum profile.

9. The outer wall of the combined aluminum profile.

10. A flat section of a combined aluminum profile.

11. The elongated ends of the outer wall of the combined aluminum profile.

12. The walls of the aluminum profile, performing the function of heat-removing fins.

13. The gap between the heat-removing fins of the first and second parts of the casing-radiator.

14. Niche for the placement of power supply elements.

15. The air gap between the niche of the power source and the aluminum profile.

16. Power supply board.

17. Transitional housing elements molded from heat-conducting plastic.

18. Ventilation cavities.

19. Elements of fastening of the lens.

The LED lamp comprises a radiator housing 1 coated with a dielectric heat-conducting plastic 2; board 3 with LEDs 4; diffuser 5, covering the LEDs 4; the power source 6 and the base 7. The radiator housing 1 includes first and second detachable parts, each of which contains a combined aluminum profile 8, the outer wall 9 of which has a flat section 10 and elongated ends 11, while the inner surface of this flat section 10 is provided with heat sinks fins 12. The heat sink fins 12 of the first part of the housing-radiator 1 are oriented towards the heat sink fins 12 of the second part of the housing-radiator 1. Such a relative position of the heat sink fins 12 creates ventilation cavities 19, about providing through ventilation of the radiator housing 1 in one direction. To ensure the efficiency of convective heat dissipation at any position of the lamp, a gap 13 is formed between the heat-removing ribs 12 of the first and second parts of the radiator housing 1, which allows ventilation of the radiator housing 1 in the other direction, and the gap 13 is selected depending on the amount of heat generated by the lamp.

A board of 3 LEDs 4 is mounted on flat sections 10 of the outer walls 9 of the aluminum profiles 8 of the first and second parts of the radiator body 1. In this case, the elongated ends 11 of the outer wall 9 of each aluminum profile 8 are connected to the base 7 by transition elements 17, which are formed of heat-conducting dielectric plastic 2 simultaneously with the filling of each of the parts of the radiator housing 1. The niche 14 for the power source 6 is formed by pouring heat-conducting plastic 2 and is separated from the aluminum profile 8 by an air gap 15, providing At the same time, the autonomy of the temperature regime of the power source 6 and a sharp increase in the life of the lamp. The power source 6 is mounted on a board 16, which is installed along the axis of the radiator casing 1 and provides an electrical connection of the base 7 with the board 3 of the LEDs 4.

Examples of implementation

In the drawings of FIG. 1 and FIG. 2 shows a preferred embodiment of an LED lamp comprising a prefabricated housing-radiator 1 made of two substantially symmetrical parts, each of which includes identical aluminum profiles, for example, shown in FIG. 5, coated with thermally conductive dielectric material 2 on all sides. The heat-removing fins 12 connect the flat portion 10 with the elongated ends 11 of the outer wall 9 of the aluminum profile 8. The heat is also removed along the outer wall 9 of the aluminum profile 8. Between the heat-removing fins 12, ventilation cavities 18 are created capable of providing free air convection.

The surface of the niche 14 with the power source 6 is surrounded by an air gap 15 so that the heat generated by the LEDs 4 practically does not affect the operation of the power supply 6 mounted on a vertically mounted board 16, electrically connected to the board 3 of the LEDs 4 mounted on the surface of a flat section 10 aluminum profiles 8. The electronic components of the power supply 6 are mounted on a vertical board 16, and some of these components are located in that part of the board 16, which is located in the base 7, and the hinged gab itnye power components 6 are mounted so that disposed in the recess 14.

The elongated walls 11 are connected to the base 7 using heat-conducting plastic 2, from the material of which the transition elements 17 are formed.

The assembly of this embodiment of the LED lamp is as follows. On the prepared first half of the radiator case 1, including an extrusion aluminum profile 8, coated on all sides with a heat-conducting dielectric plastic 2, and transition elements 17 formed from it, half of the niche 14, half of the fastener 19 for the diffuser 5, a board of 16 LEDs 4 is placed on a flat section 10 of an aluminum profile 8. Install the board 16 of the power source 6 longitudinally to the axis of the lamp, so that it is electrically connected to the board 3 of the LEDs and the base 7. Prepared as described above The second half of the housing-radiator 1 is mated with the first half of the housing-radiator 1. The described halves of the housing-radiator 1 are connected by a socle 7 along the cylindrical surface of the transition elements 17. The diffuser 5 is fastened to the fastening elements 19 to connect the parts of the lamp-radiator housing. This completes the process of assembling the LED lamp.

Industrial Applicability

The manufacturing technology of LED lamp elements is widely known, well mastered and provided with high-performance technological machines of varying degrees of automation.

Claims (1)

An LED lamp comprising a radiator housing coated with a dielectric heat-conducting plastic; circuit board with LEDs; diffuser that covers the LEDs; a power source and a base, characterized in that the radiator case consists of the first and second parts, each of which includes a combined aluminum profile, the inner and outer surface of which is covered with dielectric heat-conducting plastic, the outer wall has elongated ends and a flat surface area provided with heat-removing fins cooling, while the heat sink fins of the first part of the heat sink body are oriented towards the heat sink fins of the second part of the heat sink body and are mounted with a gap ; LED board installed on flat surface areas of each aluminum profile; and the elongated ends of the outer wall of each aluminum profile are connected to the base using a dielectric heat-conducting plastic, from the material of which a niche is made between the elongated ends of the outer wall of the aluminum profile to accommodate the power source, separated from the aluminum profile by an air gap.

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